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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 708 | * @return string The trackback URL after being filtered |
| 709 | */ |
| 710 | function get_trackback_url() { |
| 711 | global $id; |
| 712 | if ( '' != get_option('permalink_structure') ) { |
| 713 | $tb_url = trailingslashit(get_permalink()) . user_trailingslashit('trackback', 'single_trackback'); |
| 714 | } else { |
| 715 | $tb_url = get_option('siteurl') . '/wp-trackback.php?p=' . $id; |
| 716 | } |
| 717 | return apply_filters('trackback_url', $tb_url); |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * Displays the current post's trackback URL. |
| 722 | * |
| 723 | * @since 0.71 |
| 724 | * @uses get_trackback_url() Gets the trackback url for the current post |
| 725 | * |
| 726 | * @param bool $deprecated_echo Remove backwards compat in 2.5 |